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Hydraulic Step: Bulletin No; 2 of the Department of Mechanical Engineering, University of California (Classic Reprint): Bulletin No; 2 of the Department of Mechanical Engineering, University of California (Classic Reprint)

Hydraulic Step: Bulletin No; 2 of the Department of Mechanical Engineering, University of California (Classic Reprint): Bulletin No; 2 of the Department of Mechanical Engineering, University of California (Classic Reprint)

          
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About the Book

Excerpt from Hydraulic Step: Bulletin No; 2 of the Department of Mechanical Engineering, University of California

The machinery which was used in connection with a cer tain pumping system for irrigation contained a vertical shaft which supported a heavy load and rotated in water at a high velocity. The whole plant was required to be of such con struction as to dispense with the necessity of supervision.

Under these conditions the footstep of the shaft claimed careful consideration. Lubrication, except with water, was out of the question. The use of lignum vitae was also of doubtful utility on account of the grit, of which the water carried considerable quantities. Girard's method of forcing water between the surfaces of contact by means of a force pump'le was too complicated and lacked permanency.

In this dilemma it occurred to me that a permanent water pressure might be established through the agency of a. Forced vortex, created by the rotation of the shaft itself, which, in acting against a disc attached to the shaft, could be made to balance a portion of or the whole load.

Fig. 1 is a sectional View of the footstep, through the axis of shaft, S. It represents a. Cylindrical vessel, composed of a number of identical compartments m, m, etc. (the drawing shows three). The concentric shaft S, passes freely through these and rests on an ordinary footstep, which is attached to the bottom of the lowest compartment. The shaft carries for each division a disc of a diameter just sufficient to clear the surrounding face of the cylinder, and midway between top and bottom. The upper part of each disc is provided with radial ribs or blades r, r, and the bottom of each vessel is pro vided with stationary ribs r, r.

About the Publisher

Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com

This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.


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Product Details
  • ISBN-13: 9780656201679
  • Publisher: Forgotten Books
  • Publisher Imprint: Forgotten Books
  • Height: 152 mm
  • Returnable: N
  • ISBN-10: 0656201673
  • Publisher Date: 04 Nov 2018
  • Binding: Hardback
  • Language: English
  • Width: 6 mm


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Hydraulic Step: Bulletin No; 2 of the Department of Mechanical Engineering, University of California (Classic Reprint): Bulletin No; 2 of the Department of Mechanical Engineering, University of California (Classic Reprint)
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